Bump Swatinem/rust-cache from 2.6.1 to 2.6.2 (use-ink#1882)

Bumps [Swatinem/rust-cache](https://github.com/swatinem/rust-cache) from 2.6.1 to 2.6.2.
- [Release notes](https://github.com/swatinem/rust-cache/releases)
- [Changelog](https://github.com/Swatinem/rust-cache/blob/master/CHANGELOG.md)
- [Commits](Swatinem/rust-cache@v2.6.1...v2.6.2)

---
updated-dependencies:
- dependency-name: Swatinem/rust-cache
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/examples.yml

@@ -77,7 +77,7 @@ jobs:
             substrate-contracts-node -lruntime::contracts=debug  2>&1 | tee /tmp/contracts-node.log &
 
       - name: Rust Cache
-        uses: Swatinem/[email protected].1
+        uses: Swatinem/[email protected].2
 
       - name: Install `cargo-contract` `master`
         uses: actions-rs/cargo@v1